CN103840598A - Sealing module of hydrodynamic bearing and spindle motor having the same - Google Patents

Sealing module of hydrodynamic bearing and spindle motor having the same Download PDF

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Publication number
CN103840598A
CN103840598A CN201310617773.XA CN201310617773A CN103840598A CN 103840598 A CN103840598 A CN 103840598A CN 201310617773 A CN201310617773 A CN 201310617773A CN 103840598 A CN103840598 A CN 103840598A
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CN
China
Prior art keywords
sleeve pipe
bend
strutting piece
axle
described sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310617773.XA
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Chinese (zh)
Inventor
申铉浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electro Mechanics Co Ltd
Original Assignee
Samsung Electro Mechanics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electro Mechanics Co Ltd filed Critical Samsung Electro Mechanics Co Ltd
Publication of CN103840598A publication Critical patent/CN103840598A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/086—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/20—Digital stores in which the information is moved stepwise, e.g. shift registers using discharge tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
    • F16C17/102—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure
    • F16C17/107—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure with at least one surface for radial load and at least one surface for axial load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C31/00—Bearings for parts which both rotate and move linearly
    • F16C31/04—Ball or roller bearings
    • F16C31/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/74—Sealings of sliding-contact bearings
    • F16C33/741—Sealings of sliding-contact bearings by means of a fluid
    • F16C33/743—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap
    • F16C33/745—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap by capillary action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2370/00—Apparatus relating to physics, e.g. instruments
    • F16C2370/12—Hard disk drives or the like

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Sliding-Contact Bearings (AREA)
  • Sealing Of Bearings (AREA)

Abstract

Disclosed herein is a sealing module of a hydrodynamic bearing in which oil is filled in a micro gap between a shaft and a sleeve to form a hydrodynamic bearing part, wherein the shaft is fixedly coupled to a holder, the sleeve is rotatably supported by the shaft, the sleeve and the holder include bent parts formed at facing surfaces thereof in a direction perpendicular to an axial direction of the shaft respectively, and a maze type sealing part is formed by the bent parts.

Description

The seal modules of hydrodynamic bearing and comprise the spindle motor of sealing module
The cross reference of related application
The application requires to be called in the name that on November 27th, 2012 submits to the priority of the korean patent application No.10-2012-0135423 of " seal modules of Sealing Module of Hydrodynamic Bearing and Spindle Motor having the same(hydrodynamic bearing and comprise the spindle motor of sealing module) ", at this its full content by reference to being incorporated in the application.
Technical field
The present invention relates to a kind of seal modules of hydrodynamic bearing and comprise the spindle motor of sealing module.
Background technology
Conventionally, in the spindle motor of the drive unit as such as the recording disc of hard disk or analog, used widely hydrodynamic bearing, this hydrodynamic bearing uses the power pressure being produced by the lubricating fluid such as oil or analog being stored in the time that motor rotates between rotor element and stator elements.
More specifically, owing to only comprising that the spindle motor of hydrodynamic bearing that the activity pressure of the lubricating oil by being produced by centrifugal force carrys out the axle rigidity of retainer shaft is based on centrifugal force, therefore metal friction can not be produced and sense of stability increases along with the increase of rotary speed, the noise and the vibration that produce are reduced, and rotating object can be to rotate at a high speed quickly than the motor that comprises ball bearing.Therefore, described spindle motor is mainly used in high-end optical disc apparatus, disk set or analog.
In addition, according to comprising in the spindle motor of prior art of following correlation technique document, be formed with the oil seal portion of injecting for sealing oil to form hydrodynamic bearing.In the situation that applying external impact force, the rotor element of hydrodynamic bearing with in stator elements, produce at once relative motion.
Therefore, in oil, produce strong pressure wave, and pressure wave is passed to oily interface, leaks thereby produce oil.In addition, oil leaks and causes shortage of oil, and therefore, the performance of motor worsens because of shortage of oil.
In order to prevent that above-described oil from leaking, seal is formed as taper, and oily interface can keep by surface tension, therefore can not produce oil and leak.But, in the case of applying at once larger impulsive force, can produce oil and leak, and oil is evaporated to outside, therefore may reduce the expected service life of motor, and motor may be driven astatically.
[prior art document]
[patent documentation]
The open No.2009-0276996 of [patent documentation 1] United States Patent (USP).
Summary of the invention
The spindle motor that the present invention is devoted to provide a kind of seal modules of hydrodynamic bearing and comprises sealing module, thus described seal modules can prevent that to the damping action of oil stream oil from leaking to produce in the time there is external impact by form bend at described sealing.
In addition, the spindle motor that the present invention is devoted to provide a kind of seal modules of hydrodynamic bearing and comprises sealing module, described seal modules can form the oil that instant negative pressure that oil storage grooves prevents from producing in the situation that making described rotor element increase due to external impact or declining causes by the outer peripheral portion in the face of the described axle of described rotor element and leak.
According to one of the present invention preferred embodiment, a kind of seal modules of hydrodynamic bearing is provided, wherein, in microgap between axle and sleeve pipe, fill oil to form hydrodynamic bearing portion, wherein said axle is fixedly connected to strutting piece, described sleeve pipe rotatably supports by described axle, described sleeve pipe comprises respectively with described strutting piece the lip-deep bend facing with each other that is formed on described sleeve pipe and described strutting piece along the direction vertical with the axis direction of described axle, and forms labyrinth type sealing by described bend.
The bend of described sleeve pipe can be outstanding and recessed to make to be alternately provided with protuberance and concave part at the outer peripheral portion of described sleeve pipe, and the bend of described strutting piece can comprise the concave part and the protuberance being formed as in the face of the concave part of described sleeve pipe that are formed as in the face of the protuberance of described sleeve pipe.
The bend of described sleeve pipe can upwards be given prominence to continuously from the bottom of described sleeve pipe and be recessed into so that described protuberance and described concave part are alternately arranged.
The bend of described sleeve pipe and the bend of described strutting piece can be formed as multiple, so that described protuberance and the described concave part in the face of described protuberance are alternately arranged.
Described sleeve pipe can be positioned on described strutting piece, and the outer surface of described axle can be provided with the oil storage grooves in the face of the bottom of described sleeve pipe.
Described oil storage grooves can be the annular groove along the circumferential formation of described axle.
According to another kind of preferred implementation of the present invention, a kind of spindle motor is provided, this spindle motor comprises: rotor element, this rotor element comprises sleeve pipe hub and the magnet being connected with the interior perimeter surface of described sleeve pipe hub, and stator elements, this stator elements comprises axle, strutting piece, matrix and armature, described axle rotatably supports described sleeve pipe hub, described axle is fixedly connected to described strutting piece, described strutting piece is connected in described matrix, described armature is connected in the outer peripheral portion of described matrix to face described magnet, wherein, by filling and form hydrodynamic bearing portion as the oil of working fluid between described rotor element and described stator elements, the sleeve pipe hub of described rotor element and comprise respectively the lip-deep bend facing with each other being formed on separately in the face of the strutting piece of the stator elements of described sleeve pipe hub, and form labyrinth type sealing by described bend.
The bend of described sleeve pipe hub can be outstanding and recessed to make to be alternately provided with protuberance and concave part in the outer peripheral surface portion of described sleeve pipe hub, and the bend of described strutting piece can comprise the concave part that is formed as the protuberance of facing described sleeve pipe hub and the protuberance of facing the concave part of described sleeve pipe hub.
The bend of described sleeve pipe hub can upwards be given prominence to continuously from the bottom of described sleeve pipe hub and be recessed into so that described protuberance and described concave part are alternately arranged.
The bend of described sleeve pipe hub and the bend of described strutting piece can be formed as multiple so that described protuberance and described concave part and alternately arrange.
Described sleeve pipe hub can be positioned on described strutting piece, and the outer surface of described axle can be provided with the oil storage grooves in the face of the bottom of described sleeve pipe hub.
Described oil storage grooves can be the annular groove along the circumferential formation of described axle.
Described stator elements can also comprise seal, and described seal is connected in the upper end of described axle and is arranged in the face of described sleeve pipe hub, and in the gap of described sleeve pipe hub, can be formed with the top oil seal portion for sealing oil.
Brief description of the drawings
By the detailed description below in conjunction with accompanying drawing, will more clearly understand above and other object of the present invention, feature and advantage, wherein:
Fig. 1 is the cutaway view schematically showing according to the seal modules of the hydrodynamic bearing of the preferred embodiment of the present invention;
Fig. 2 schematically shows the cutaway view being provided with according to the spindle motor of the seal modules of the hydrodynamic bearing of the preferred embodiment of the present invention;
Fig. 3 A to Fig. 3 C is the cutaway view of the spindle motor different conditions shown in Fig. 2, and wherein Fig. 3 A has shown normal condition, and Fig. 3 B has shown the state that rotor element rises, and Fig. 3 C has shown the state that rotor element declines.
Embodiment
By below in conjunction with accompanying drawing to detailed description of the preferred embodiment, will more clearly understand object of the present invention, feature and advantage.In institute's drawings attached, identical Reference numeral is used for representing same or analogous part, and omits the description repeating.In addition, in the following description, term " first ", " second ", " side ", " opposite side " and similar vocabulary are used for distinguishing certain part and another part, but the structure that should not be construed as these parts is subject to the restriction of these terms.In addition,, in the description of this invention, when determining purport of the present invention can be covered to the detailed description of correlation technique time, will omit associated description.
Hereinafter, with reference to accompanying drawing, the preferred embodiment of the present invention is described in detail.
Fig. 1 is the cutaway view schematically showing according to the seal modules of the hydrodynamic bearing of the preferred embodiment of the present invention.
As shown in Figure 1, the seal modules of hydrodynamic bearing comprises axle 10, sleeve pipe 20 and strutting piece 30, wherein form hydrodynamic bearing portion by the microgap of filling between described axle and described sleeve pipe with oil, bend is formed on respectively on the surface that the direction along vertical with the axis direction of axle 10 of sleeve pipe 20 and described strutting piece faces with each other, and forms labyrinth type sealing by described bend.
More specifically, be fixedly connected to the internal circumference part of strutting piece 30 as the axle 10 of stator elements.In addition, be rotatably connected in the outer peripheral portion of axle 10 and be positioned on strutting piece 30 as the sleeve pipe 20 of rotor element.
In addition, sleeve pipe 20 comprises bend 21, and bend 21 is formed on the radial direction along axle 10 of sleeve pipe 20 in the face of the outer peripheral portion of strutting piece.In addition, bend 21 is upwards outstanding and recessed continuously from the end portion of the periphery of described sleeve pipe, and protuberance 21a and concave part 21b are alternately arranged.
In addition the radial direction along axle 10 that, bend 31 is formed on strutting piece 30 is in the face of on a surface of sleeve pipe 20.In addition, concave part 31a and protuberance 31b are alternately formed at bend 31 to face respectively protuberance 21a and the concave part 21b of described sleeve pipe.
Therefore, described labyrinth type sealing forms by the bend 21 of described sleeve pipe and the bend 31 of described strutting piece,, the protuberance by described sleeve pipe and forming in the face of the concave part of described strutting piece of the protuberance of described sleeve pipe and the concave part of described sleeve pipe with in the face of the protuberance of the described strutting piece of the concave part of described sleeve pipe.
In addition, can form multiple labyrinths type sealing so that described protuberance and the concave part in the face of described protuberance are alternately arranged.
In addition, according in the seal modules of the hydrodynamic bearing of the preferred embodiment of the present invention, the outer surface of described axle can be provided with the oil storage grooves 11 in the face of the bottom of sleeve pipe 20 along the axis direction of described axle.The cavitation of oil storage grooves 11 for preventing from causing because of the negative pressure of external impact force or the generation of similar power in the time that rotor element rises.
In addition, oil storage grooves 11 can be formed in the circumferential annular groove of described axle.
As above according in the seal modules of the hydrodynamic bearing of the preferred embodiment of the present invention, described hydrodynamic bearing portion forms by injection oil in the microgap between described axle and described sleeve pipe, described oil is filled into along in the microgap between described sleeve pipe and described strutting piece on the axis direction of described axle, and labyrinth type oil seal portion of described oil seal portion is formed on along in the microgap between described sleeve pipe and the described strutting piece of the radial direction of described axle,, the gap between the bend 21 of described sleeve pipe and the bend 31 of described strutting piece.
Fig. 2 schematically shows the cutaway view being provided with according to the spindle motor of the seal modules of the hydrodynamic bearing of the preferred embodiment of the present invention.
As shown in Figure 2, spindle motor 100 comprises that stator elements, armature 140, seal 170 are with rotor element, stator elements comprises axle 110, strutting piece 120 and matrix 130, armature 140 comprises iron core 141 and coil 142, rotor element comprises sleeve pipe hub 150 and magnet 160, and by filling and form hydrodynamic bearing as the oil of working fluid between described rotor element and described stator elements.
In addition, the labyrinth type sealing that is provided with the bend for sealing described oil forms between the sleeve pipe hub 150 of described rotor element and the described strutting piece in the face of the described stator elements of described sleeve pipe hub.
More specifically, in rotor element, axle 110 is supporting sleeve hub 150 rotatably.In addition, between the inner-diameter portion whose of sleeve pipe hub 150 and the outer radius portion of axle 110, have microgap, described microgap is filled with oil, therefore forms hydrokinetic pressure bearing portion radially.For this object, hydrokinetic pressure produces groove and is selectively formed in the inner-diameter portion whose of described sleeve pipe or the outer radius portion of described axle.
In addition, sleeve pipe hub 150 comprises cannula portion 151, disk portion 152 and side wall portion 153, cannula portion 151 is faced described axle and is cylindrical shape, disk portion 152 extends from cannula portion 151 along external diameter direction, and side wall portion 153 is from the end along external diameter direction of disk portion 152 along the axis direction of described axle to downward-extension.
In addition, for sealing oil, cannula portion 151 comprises superposed upper sealing 151b and bend 151b, and bend 151b is lower seal portion and the bottom that is positioned at the axis direction of described axle.In addition, upper sealing 151b is formed as concave part with partly corresponding to seal 170.
In addition, upper sealing 151b can be formed as annular groove with the circumferential extension at described sleeve pipe.
In addition, be formed on the radial direction along axle 110 of sleeve pipe hub 150 in the face of the outer peripheral portion of strutting piece 120 as the bend 151a of lower seal.In addition, in bend 151a, sleeve pipe hub 150 is outstanding and recessed to form protuberance 151a ' and concave part 151a in the face of described strutting piece continuously ", wherein protuberance 151a ' and concave part 151a " be formed as from the bottom of the outer peripheral portion of sleeve pipe hub 150 alternately upwards layout.
In addition, side wall portion 153 comprises that the magnet 160 that is arranged on the ring-type in its circumferential surface is with the armature 140 towards comprising iron core 141 and coil 142.
Being provided with according in the spindle motor of the seal modules of the hydrodynamic bearing of the preferred embodiment of the present invention, described sleeve pipe hub can be by being individually formed the formation that then described sleeve pipe and described hub is connected to each other of sleeve pipe and hub.
Next, in stator elements, as mentioned above, axle 110 is supporting sleeve hub 150 rotatably, and comprise by press-fiting, adhesion or similar approach be fixedly connected to the seal 170 of axle 110 upper ends and be fixedly connected to the strutting piece 120 of axle 110 bottoms.
In addition, the outer surface of described axle can be provided with the oil storage grooves 111 of facing the bottom of sleeve pipe 20 along the axis direction of axle 110.The cavitation that oil storage grooves 111 causes due to the negative pressure of the generations such as external impact when preventing from rising as the sleeve pipe hub 150 of rotor element.
In addition, oil storage grooves 111 can be formed in the circumferential annular groove of described axle.
In addition, strutting piece 120 comprises sealing, and sealing portion is formed on along the radial direction of axle 110 and faces on a surface of lower seal portion of sleeve pipe hub 150.In addition, described sealing comprises bend 121a.In addition, in bend 121a, be formed with concave part 121a ' and protuberance 121a " with protuberance 151a ' and concave part 151a in the face of the lower seal portion of described sleeve pipe hub ", thereby layout alternately respectively.
Therefore, described labyrinth type sealing forms by the bend 151a of sleeve pipe hub 150 and the bend 121a of strutting piece 120.That is to say the protuberance of described labyrinth type sealing by sleeve pipe hub and forming in the face of the concave part of described strutting piece of the protuberance of sleeve pipe hub and the concave part of described sleeve pipe hub with in the face of the protuberance of the described strutting piece of the concave part of described sleeve pipe hub.
In addition, can form multiple labyrinths type sealing to make described protuberance and alternately to arrange in the face of the concave part of described protuberance.
Next, matrix 130 be included in strutting piece that its internal circumference part press-fits and by press-fiting, adhesion or similar approach be permanently connected with the armature 140 in the face of magnet 160 at its outer peripheral portion, wherein, armature 140 comprises iron core 141 and coil 142.
In addition, according in the spindle motor of the preferred embodiment of the present invention, strutting piece 120 and matrix 130 can be integrally formed each other.
In addition, the seal 170 that forms upper sealing together with sleeve pipe hub 150 is connected in the upper end of described axle.For this object, seal 170 comprises connecting portion 171 and sealing 172, and connecting portion 171 is connected to axle 110 with the outer radius portion corresponding to described axle, and sealing 172 is corresponding to the upper sealing 151b of sleeve pipe hub 150.In addition, sealing 172 can be conical in shape.
Fig. 3 A to Fig. 3 C is the cutaway view of the spindle motor different conditions shown in Fig. 2, and wherein Fig. 3 A has shown normal condition, and Fig. 3 B has shown the state that rotor element rises, and Fig. 3 C has shown the state that rotor element declines.
As shown in Figure 3A, in spindle motor, described labyrinth type sealing forms by the bend 151a of sleeve pipe hub 150 and the bend 121a of strutting piece 120 under normal condition.
In addition, as shown in Figure 3 B, make rotor element increase due to external impact etc. in the situation that, oil is introduced in the gap between sleeve pipe hub 150 and strutting piece 120.
Then, as shown in Figure 3 C, in the situation that rotor element declines, described oil is by the described labyrinth type sealing between lead-in bushing hub 150 and strutting piece 120 again.Now, decline by the rate of influx of oil in described bend at oil, therefore can prevent that oil from leaking.
According to the present invention, can obtain the seal modules of hydrodynamic bearing and comprise the spindle motor of sealing module, thereby wherein said seal modules can prevent that to the damping action of oil stream oil from leaking to produce by form bend at described sealing producing when external impact, and can leak by be formed on the oil that the instant negative pressure that prevents from producing in the face of the oil storage grooves of the outer peripheral portion of the described axle of described rotor element causes in the situation that making described rotor element increase due to external impact or declining.
Although for purposes of illustration, disclose the specific embodiment of the present invention, but should be understood that the present invention is not limited thereto, those skilled in the art should be understood that, under the prerequisite without prejudice to scope and spirit of the present invention, can carry out various amendments, interpolation or replacement to the present invention.
Correspondingly, any and whole amendments, distortion or equivalent structure all will be understood that and belong to scope of the present invention, and detailed scope of the present invention will disclose in appending claims.

Claims (13)

1. a seal modules for hydrodynamic bearing, wherein fills oil to form hydrodynamic bearing portion in the microgap between axle and sleeve pipe,
Wherein said axle is fixedly connected to strutting piece, and described sleeve pipe rotatably supports by described axle,
Described sleeve pipe comprises respectively with described strutting piece the lip-deep bend facing with each other that is formed on described sleeve pipe and described strutting piece along the direction vertical with the axis direction of described axle, and forms labyrinth type sealing by described bend.
2. seal modules according to claim 1, wherein, the bend of described sleeve pipe is outstanding and recessed to make to be alternately provided with protuberance and concave part at the outer peripheral portion of described sleeve pipe, and
The bend of described strutting piece comprises the concave part and the protuberance being formed as in the face of the concave part of described sleeve pipe that are formed as in the face of the protuberance of described sleeve pipe.
3. seal modules according to claim 2, wherein, the bend of described sleeve pipe is upwards given prominence to continuously and is recessed into so that described protuberance and described concave part are alternately arranged from the bottom of described sleeve pipe.
4. seal modules according to claim 2, wherein, the bend of described sleeve pipe and the bend of described strutting piece are formed as multiple, so that described protuberance and the described concave part in the face of described protuberance are alternately arranged.
5. seal modules according to claim 1, wherein, described sleeve pipe is positioned on described strutting piece, and the outer surface of described axle is provided with the oil storage grooves in the face of the bottom of described sleeve pipe.
6. seal modules according to claim 5, wherein, described oil storage grooves is the annular groove along the circumferential formation of described axle.
7. a spindle motor, this spindle motor comprises:
Rotor element, this rotor element comprises sleeve pipe hub and the magnet being connected with the interior perimeter surface of described sleeve pipe hub; And
Stator elements, this stator elements comprises axle, strutting piece, matrix and armature, described axle rotatably supports described sleeve pipe hub, described axle is fixedly connected to described strutting piece, described strutting piece is connected in described matrix, and described armature is connected in the outer peripheral portion of described matrix to face described magnet
Wherein, by filling and form hydrodynamic bearing portion as the oil of working fluid between described rotor element and described stator elements,
The sleeve pipe hub of described rotor element and in the face of the strutting piece of the described stator elements of described sleeve pipe hub comprises respectively the lip-deep bend facing with each other being formed on separately, and by described bend formation labyrinth type sealing.
8. spindle motor according to claim 7, wherein, the bend of described sleeve pipe hub is outstanding and recessed to make to be alternately provided with protuberance and concave part at the outer peripheral portion of described sleeve pipe hub, and
The bend of described strutting piece comprises the concave part that is formed as the protuberance of facing described sleeve pipe hub and the protuberance of facing the concave part of described sleeve pipe hub.
9. spindle motor according to claim 8, wherein, the bend of described sleeve pipe hub is upwards given prominence to continuously and is recessed into so that described protuberance and described concave part are alternately arranged from the bottom of described sleeve pipe hub.
10. spindle motor according to claim 8, wherein, the bend of described sleeve pipe hub and the bend of described strutting piece are formed as multiple, so that described protuberance and described concave part are alternately arranged.
11. spindle motors according to claim 7, wherein, described sleeve pipe hub is positioned on described strutting piece, and the outer surface of described axle is provided with the oil storage grooves in the face of the bottom of described sleeve pipe hub.
12. spindle motors according to claim 11, wherein, described oil storage grooves is the annular groove along the circumferential formation of described axle.
13. spindle motors according to claim 7, wherein, described stator elements also comprises seal, and described seal is connected in the upper end of described axle and is arranged in the face of described sleeve pipe hub, and in the gap of described sleeve pipe hub, is formed with the top oil seal portion for sealing oil.
CN201310617773.XA 2012-11-27 2013-11-27 Sealing module of hydrodynamic bearing and spindle motor having the same Pending CN103840598A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120135423A KR20140067761A (en) 2012-11-27 2012-11-27 Sealing module of hydrodynamic bearing and spindle motor having the same
KR10-2012-0135423 2012-11-27

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Publication Number Publication Date
CN103840598A true CN103840598A (en) 2014-06-04

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CN104539082B (en) * 2014-12-31 2018-03-27 广东威灵电机制造有限公司 The waterproof sealing structure and plastic packaging motor of plastic packaging stator and bearing (ball) cover

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JP4056416B2 (en) * 2003-03-24 2008-03-05 日本電産株式会社 DYNAMIC PRESSURE BEARING, SPINDLE MOTOR USING THE SAME, AND DISK DRIVE DEVICE PROVIDED WITH THE SPINDLE MOTOR
KR101101681B1 (en) * 2010-06-15 2011-12-30 삼성전기주식회사 Motor and driving device of recording disc

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Application publication date: 20140604